The Sexiest (And Most Naked) Celebs On Instagram

It's the year of the naked Instagram.

Between Miley Cyrus and her twerk revolution, Kim K and her post-baby bod, and Rihanna just being Bad Gal RiRi, this year has been a sensory overload of sexy stars showing off what their mamas gave them. To honor the time when, among other things, Kendall Jenner turned 18, we're taking a look back at the steamy celebrity social media snaps of the year past. Pants optional.